Leser: 22
$node = { x => 23, y => 12 , next => $nextnode };
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#!/usr/bin/perl -w use strict; use warnings; use Tk; use Tk::Canvas; my $mw = MainWindow->new(); $mw->state('zoomed'); my $canvas = $mw->Canvas()->pack(-expand => 1, -fill => 'both'); my %coord_1 = ( 'a' => [100,100,'b'], 'b' => [200,100,'c'], 'c' => [200,200,'d'], 'd' => [150,250,'e'], 'e' => [100,200,'a'], ); my %coord_2 = ( 'f' => [250,250,'g'], 'g' => [300,200,'h'], 'h' => [300,300,'i'], 'i' => [250,350,'j'], 'j' => [200,300,'f'], ); drawPolygon($canvas, \%coord_1, 'yellow'); my $moving_pol = drawPolygon($canvas, \%coord_2, 'lightblue'); $mw->bind('<Up>', sub{movePolygon($canvas,$moving_pol,0,-5);}); $mw->bind('<Down>', sub{movePolygon($canvas,$moving_pol,0,5);}); $mw->bind('<Left>', sub{movePolygon($canvas,$moving_pol,-5,0);}); $mw->bind('<Right>', sub{movePolygon($canvas,$moving_pol,5,0);}); Tk::MainLoop; sub drawPolygon{ my $widget = shift; my $coord = shift; my $color = shift; my @coords; foreach my $point (sort keys %{$coord}){ push(@coords, $coord->{$point}->[0], $coord->{$point}->[1]); } return $widget->createPolygon( @coords, -fill => $color, -outline => 'black', ); } sub movePolygon{ my $widget = shift; my $polygon = shift; my $x_move = shift; my $y_move = shift; foreach my $point (sort keys %coord_2){ $coord_2{$point}->[0] += $x_move; $coord_2{$point}->[1] += $y_move; } $widget->move($polygon, $x_move, $y_move); if (PolygonsOverlap(\%coord_1,\%coord_2)){ $widget->itemconfigure( $polygon, -outline => 'red', -fill => 'lightgreen', ); }else{ $widget->itemconfigure( $polygon, -outline => 'black', -fill => 'lightblue', ); } } sub PolygonsOverlap{ my %coord_1 = %{shift()}; my %coord_2 = %{shift()}; ################################# # algorithmus zum testen, ob sich # die polygone überschneiden. ################################# }
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for my $punkt (keys %polygon){ push @{ $polygon{ $polygon{$punkt}[2] } }, $punkt; }
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#!/usr/bin/perl -w use strict; use warnings; use Tk; use Tk::Canvas; use Data::Dumper; use Storable qw(dclone); my $mw = MainWindow->new(); $mw->state('zoomed'); my $canvas = $mw->Canvas()->pack(-expand => 1, -fill => 'both'); my %coord_1 = ( 'a' => [100,100,'b'], 'b' => [200,100,'c'], 'c' => [200,200,'d'], 'd' => [150,250,'e'], 'e' => [100,200,'a'], ); my %coord_2 = ( 'f' => [250,250,'g'], 'g' => [300,200,'h'], 'h' => [300,300,'i'], 'i' => [250,350,'j'], 'j' => [200,300,'f'], ); drawPolygon($canvas, \%coord_1, 'yellow', 'poly1'); #modified my $moving_pol = drawPolygon($canvas, \%coord_2, 'lightblue', 'poly2'); #modified my $moving_pol_tag='poly2'; $mw->bind('<Up>', sub{movePolygon($canvas,$moving_pol,0,-5,$moving_pol_tag);}); #modified $mw->bind('<Down>', sub{movePolygon($canvas,$moving_pol,0,5,$moving_pol_tag);}); #modified $mw->bind('<Left>', sub{movePolygon($canvas,$moving_pol,-5,0,$moving_pol_tag);}); #modified $mw->bind('<Right>', sub{movePolygon($canvas,$moving_pol,5,0,$moving_pol_tag);}); #modified Tk::MainLoop; sub drawPolygon{ my $widget = shift; my $coord = shift; my $color = shift; my $tag = shift; #added my @coords; foreach my $point (sort keys %{$coord}){ push(@coords, $coord->{$point}->[0], $coord->{$point}->[1]); } return $widget->createPolygon( @coords, -fill => $color, -outline => 'black', -tag => $tag #added ); } sub movePolygon{ my $widget = shift; my $polygon = shift; my $x_move = shift; my $y_move = shift; my $tag = shift; #added foreach my $point (sort keys %coord_2){ $coord_2{$point}->[0] += $x_move; $coord_2{$point}->[1] += $y_move; } $widget->move($polygon, $x_move, $y_move); if (PolygonsOverlap(\%coord_2,$tag)){ #modified $widget->itemconfigure( $polygon, -outline => 'red', -fill => 'lightgreen' ); }else{ $widget->itemconfigure( $polygon, -outline => 'black', -fill => 'lightblue' ); } } ################################### # algorithmus zum testen, ob sich # # die polygone überschneiden. # ################################### sub PolygonsOverlap{ #my %coord_1 = %{shift()}; my %coord_2 = %{shift()}; my $moving_pol_tag = shift; # name of the polygon that we are moving around my $bboxes; # hash of all bounding boxes to check my $clonedbboxes; # clone of bboxes. Used only for loop iteration to avoid side effects when manipulating $bboxes inside the loop #my $tbboxes; my $objectshit; # names of the objects you have hit my $xm=1; # 1 needed for first run my $ym=1; my $DEBUG=0; print "--- entering colissioncheck ---\n" if ($DEBUG); my $bboxname='1'; # The first bounding box is a large rectangle that encloses the polygon completly. Lets call it '1' $bboxes->{$bboxname}->{bbxmin}=999999; $bboxes->{$bboxname}->{bbxmax}=0; $bboxes->{$bboxname}->{bbymin}=999999; $bboxes->{$bboxname}->{bbymax}=0; #reduce the size of the same rectangle to exactly enclose our moving polygon foreach my $point (keys %coord_2){ $bboxes->{$bboxname}->{bbxmin}=$coord_2{$point}->[0] if ($coord_2{$point}->[0] < $bboxes->{$bboxname}->{bbxmin}); $bboxes->{$bboxname}->{bbxmax}=$coord_2{$point}->[0] if ($coord_2{$point}->[0] > $bboxes->{$bboxname}->{bbxmax}); $bboxes->{$bboxname}->{bbymin}=$coord_2{$point}->[1] if ($coord_2{$point}->[1] < $bboxes->{$bboxname}->{bbymin}); $bboxes->{$bboxname}->{bbymax}=$coord_2{$point}->[1] if ($coord_2{$point}->[1] > $bboxes->{$bboxname}->{bbymax}); } while (scalar keys %{$bboxes} > 0) { # keep checking as long as we have bboxes #my @deleteme; # remove comment if you dont want to use dclone #my $tbboxes; # remove comment if you dont want to use dclone my $numberofbboxes = scalar keys %{$bboxes}; print "number of bboxes to check: $numberofbboxes\n" if ($DEBUG); %{$clonedbboxes} = %{ dclone \%{$bboxes} }; # clone the original bboxes hash and use it to control the loop, just to avoid side effects foreach my $thisbboxname (keys %{$clonedbboxes}) { # process all bounding boxes my @objectsfound; print "next bbox to check: $thisbboxname (".$bboxes->{$thisbboxname}->{bbxmin}.",".$bboxes->{$thisbboxname}->{bbymin}." ". $bboxes->{$thisbboxname}->{bbxmax}.",".$bboxes->{$thisbboxname}->{bbymax}.")\n" if ($DEBUG); #find canvas objects overlapping the current boundary box foreach my $thisobject ($canvas->find('overlapping', $bboxes->{$thisbboxname}->{bbxmin}, $bboxes->{$thisbboxname}->{bbymin},$bboxes->{$thisbboxname}->{bbxmax},$bboxes->{$thisbboxname}->{bbymax})) { my @tags = $canvas->gettags($thisobject); # get the tags of the objects found #next if ($tags[0] eq $moving_pol_tag); push (@objectsfound,$tags[0]); # save the name we have given to our objects. Be careful here when using more than one tag for your objects } my $objcount=scalar @objectsfound; print "$moving_pol_tag: $objcount overlapping objects inside bboxname: $thisbboxname (".$bboxes->{$thisbboxname}->{bbxmin}.",".$bboxes->{$thisbboxname}->{bbymin}." ".$bboxes->{$thisbboxname}->{bbxmax}.",".$bboxes->{$thisbboxname}->{bbymax}."): ".join(',',@objectsfound)."\n" if ($DEBUG); if ($objcount > 1) { # found another object in the near so start locating it # split this bounding box in the middle and create four smaller ones # AB # CD if (($xm>0) || ($ym>0)) { # can the bbox be split any further ? $xm=int(($bboxes->{$thisbboxname}->{bbxmax} - $bboxes->{$thisbboxname}->{bbxmin})/2); $ym=int(($bboxes->{$thisbboxname}->{bbymax} - $bboxes->{$thisbboxname}->{bbymin})/2); print "creating new bounding boxes:\n" if ($DEBUG); # change the following 16 $bboxes on the left hand side to $tbboxes (and the print statements) to save new bboxes to a temp hash if you dont want to use dclone #create rectangle A $bboxname=$thisbboxname.'A'; $bboxes->{$bboxname}->{bbxmin}=$bboxes->{$thisbboxname}->{bbxmin}; $bboxes->{$bboxname}->{bbymin}=$bboxes->{$thisbboxname}->{bbymin}; $bboxes->{$bboxname}->{bbxmax}=$bboxes->{$thisbboxname}->{bbxmin} + $xm; $bboxes->{$bboxname}->{bbymax}=$bboxes->{$thisbboxname}->{bbymin} + $ym; print "$bboxname: ".$bboxes->{$bboxname}->{bbxmin}.",".$bboxes->{$bboxname}->{bbymin}." ".$bboxes->{$bboxname}->{bbxmax}.",".$bboxes->{$bboxname}->{bbymax}."\n" if ($DEBUG); #create rectangle B $bboxname=$thisbboxname.'B'; $bboxes->{$bboxname}->{bbxmin}=$bboxes->{$thisbboxname}->{bbxmin} + $xm + 1; $bboxes->{$bboxname}->{bbymin}=$bboxes->{$thisbboxname}->{bbymin}; $bboxes->{$bboxname}->{bbxmax}=$bboxes->{$thisbboxname}->{bbxmax}; $bboxes->{$bboxname}->{bbymax}=$bboxes->{$thisbboxname}->{bbymin} + $ym; print "$bboxname: ".$bboxes->{$bboxname}->{bbxmin}.",".$bboxes->{$bboxname}->{bbymin}." ".$bboxes->{$bboxname}->{bbxmax}.",".$bboxes->{$bboxname}->{bbymax}."\n" if ($DEBUG); #create rectangle C $bboxname=$thisbboxname.'C'; $bboxes->{$bboxname}->{bbxmin}=$bboxes->{$thisbboxname}->{bbxmin}; $bboxes->{$bboxname}->{bbymin}=$bboxes->{$thisbboxname}->{bbymin} + $ym + 1; $bboxes->{$bboxname}->{bbxmax}=$bboxes->{$thisbboxname}->{bbxmin} + $xm; $bboxes->{$bboxname}->{bbymax}=$bboxes->{$thisbboxname}->{bbymax}; print "$bboxname: ".$bboxes->{$bboxname}->{bbxmin}.",".$bboxes->{$bboxname}->{bbymin}." ".$bboxes->{$bboxname}->{bbxmax}.",".$bboxes->{$bboxname}->{bbymax}."\n" if ($DEBUG); #create rectangle D $bboxname=$thisbboxname.'D'; $bboxes->{$bboxname}->{bbxmin}=$bboxes->{$thisbboxname}->{bbxmin} + $xm + 1; $bboxes->{$bboxname}->{bbymin}=$bboxes->{$thisbboxname}->{bbymin} + $ym + 1; $bboxes->{$bboxname}->{bbxmax}=$bboxes->{$thisbboxname}->{bbxmax}; $bboxes->{$bboxname}->{bbymax}=$bboxes->{$thisbboxname}->{bbymax}; print "$bboxname: ".$bboxes->{$bboxname}->{bbxmin}.",".$bboxes->{$bboxname}->{bbymin}." ".$bboxes->{$bboxname}->{bbxmax}.",".$bboxes->{$bboxname}->{bbymax}."\n" if ($DEBUG); print Dumper($bboxes) if ($DEBUG); } #end if $xm>0... else { #smallest bbox still has something overlapping...so its a collision print "$moving_pol_tag: collision detected: ".join(',',@objectsfound)." in $thisbboxname (".$bboxes->{$thisbboxname}->{bbxmin}.",".$bboxes->{$thisbboxname}->{bbymin}." ".$bboxes->{$thisbboxname}->{bbxmax}.",".$bboxes->{$thisbboxname}->{bbymax}.") !!!!!\n" if ($DEBUG); foreach my $thishit (@objectsfound) { next if ($thishit eq $moving_pol_tag); # do not add the moving polygon print "adding $thishit to objectshit hash\n" if ($DEBUG); $objectshit->{$thishit}=1; # use hash to get a unique list of objects hit. Save collision coords here if you need it } } } delete $bboxes->{$thisbboxname}; # comment this line out if you dont want to use dclone print "deleting bbox $thisbboxname\n" if ($DEBUG); # comment this line out if you dont want to use dclone #print "marking $thisbboxname for deletion\n" if ($DEBUG); # uncomment this line if you dont want to use dclone #push (@deleteme,$thisbboxname); # uncomment this line if you dont want to use dclone } #end of the loop foreach my thisbboxname print "end of foreach thisbboxname\n" if ($DEBUG); # foreach (@deleteme) { # uncomment this line if you dont want to use dclone # print "deleting bbox $_\n" if ($DEBUG); # uncomment this line if you dont want to use dclone # delete $bboxes->{$_} ; # uncomment this line if you dont want to use dclone # } # uncomment this line if you dont want to use dclone # foreach my $thisbboxname (keys %{$tbboxes}) { # uncomment this line if you dont want to use dclone # print "adding bbox: $thisbboxname to original bboxhash\n" if ($DEBUG); # uncomment this line if you dont want to use dclone # $bboxes->{$thisbboxname}->{bbxmin}=$tbboxes->{$thisbboxname}->{bbxmin}; # uncomment this line if you dont want to use dclone # $bboxes->{$thisbboxname}->{bbymin}=$tbboxes->{$thisbboxname}->{bbymin}; # uncomment this line if you dont want to use dclone # $bboxes->{$thisbboxname}->{bbxmax}=$tbboxes->{$thisbboxname}->{bbxmax}; # uncomment this line if you dont want to use dclone # $bboxes->{$thisbboxname}->{bbymax}=$tbboxes->{$thisbboxname}->{bbymax}; # uncomment this line if you dont want to use dclone # } # uncomment this line if you dont want to use dclone } #end while my $numberofobjectshit= scalar keys %{$objectshit}; print "Number of objects hit: $numberofobjectshit\n" if ($DEBUG); if ($numberofobjectshit > 0) { print "The following objects have been hit by $moving_pol_tag: ",join (",",keys %{$objectshit})."\n"; } print "--- end of collisioncheck---\n" if ($DEBUG); return $numberofobjectshit; }